package com.ndood.code.util;

public class Unicode {

	/**
	 * 
	 * unicode 转换成 中文
	 * 
	 * @param theString
	 * @return
	 */

	public static String decodeUnicode(String theString) {

		char aChar;

		int len = theString.length();

		StringBuffer outBuffer = new StringBuffer(len);

		for (int x = 0; x < len;) {

			aChar = theString.charAt(x++);

			if (aChar == '\\') {

				aChar = theString.charAt(x++);

				if (aChar == 'u') {

					// Read the xxxx

					int value = 0;

					for (int i = 0; i < 4; i++) {

						aChar = theString.charAt(x++);

						switch (aChar) {

						case '0':

						case '1':

						case '2':

						case '3':

						case '4':

						case '5':

						case '6':
						case '7':
						case '8':
						case '9':
							value = (value << 4) + aChar - '0';
							break;
						case 'a':
						case 'b':
						case 'c':
						case 'd':
						case 'e':
						case 'f':
							value = (value << 4) + 10 + aChar - 'a';
							break;
						case 'A':
						case 'B':
						case 'C':
						case 'D':
						case 'E':
						case 'F':
							value = (value << 4) + 10 + aChar - 'A';
							break;
						default:
							throw new IllegalArgumentException("Malformed   \\uxxxx   encoding.");
						}

					}
					outBuffer.append((char) value);
				} else {
					if (aChar == 't')
						aChar = '\t';
					else if (aChar == 'r')
						aChar = '\r';

					else if (aChar == 'n')

						aChar = '\n';

					else if (aChar == 'f')

						aChar = '\f';

					outBuffer.append(aChar);

				}

			} else

				outBuffer.append(aChar);

		}

		return outBuffer.toString();

	}

	public static String toUnicodeString(String s) {

		try {
			if (s == null) {
				return "";
			}
			StringBuffer sb = new StringBuffer();
			for (int i = 0; i < s.length(); i++) {
				char c = s.charAt(i);
				if (c >= 0 && c <= 255) {
					sb.append(c);
				} else {
					sb.append("\\u" + Integer.toHexString(c));
				}
			}
			return sb.toString();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return s;
		}
	}

}
